Heat-exchange device



Feb. 3, 1931i. H.'v. DALGLlEsH 1,791,483

HEAT'EXCHANGE DEVICE Filed May 20, 1930 2 Sheets-Sheet 1 @Wwf/ 4. 'Y MWmmmf Feb. 3, 1931. H. v. DALGLIESH HEATv EXCHANGE DEVICE Filed May 20,1950 2 Sheets-Sheet 2 dummy:

Patented Feb. 3, 1931 UNITED STATES PATENT OFFICE HERBERT V. DALGLIESH,OF ATLNTA, GEORGIA, ASSIG-NOR, BY MESNE ASSIGNMENTS, TO RESEARCH &DEVELOPMENT CORPORATION Application led May 20,

l tortuous passage for a liquid in contact with a wall exteriorlycontacted by a gaseous medium of different temperature so arranged thatsubstantially the entire surface of the wall is utilized for heatconduction and that portions of the liquid are caused to move moreslowly than other portions thereof to provide a homogeneous temperaturethroughout the bodyv of the liquid. A

Y It is a further object of the invention to provide a heat exchangedevice comprising spaced corrugated plates so arranged as to present nodirect path for liquid to flow therebetween but forcing the liquid toflow in a tortuous path and provided with means to space the platesapart and to correctly locate the plates relative to'each other inassembly, said means providing internal bracing for the plates.

It is a further object of the invention specically to provide an oilcooler for use with internal combustion motors.

Further objects of the invention will ap pear from the followingdescription when read in connection with the accompanying drawingsshowing illustrative embodiments of the invention and wherein Fig. 1 isan end view of an oil cooler;

Fig. 2 is a side elevation of an oil cooler partly broken away;

Fig. 3 is a plan view of the heat exchange element of the cooler partlybroken away;

- Fig. 4 is a detail vertical cross section of a form of the devicewherein the heat exchange elements are arranged in parallel suitable,for instance, for use as an automobile radiator;

Fig. 5 is a detail horizontal section on line 5-.5 of Fig. 4; l;

Fig. 6 is a detail perspective view, the end 'shown in vertical sectionto illustrate the structure of the heat exchange device, the arrangementshown being that adapted for an 1930. Serial N0. 454,013.

oil cooler such as shown in Figs. 1 to 3'in.

elusive; and

Figs. 7 and 8 are detail perspective views shown in end section ofmodified forms.

As shown in Figs. 4 and 6, the heat exchange elements constructed inaccordance with the invention are formed of corrugated plates 10, 11shown as formed with angular corrugations although it is obvious thatcurved corrugations may be utilized in the same manner.

To space the plates 10, 11 apart and to properly locate the corrugationsof the two plates with respect to eachother so as to provide a tortuouspath for liquid flowing therebetween, there are shown a plurality ofspaced strips 12 which are likewise corrugated but with corrugationsconsiderably more shallow than are the corrugations of plates 10, 11.

The strips 12 are as shown applied vto one of the plates as for instanceplate 10 with the apices of the interiorly projecting corrugations ofplate 10 in contact with the apices of the oppositely directedcorrugatins of the strip 12 and the plate 11 is then placed into contactwith the strips 12 with the apices thereof in contact with the alternatecorrugations of the strips. The result of such assembly is that thecorrugations of the plates 10 and 11 are in nested relation but spacedapart from each other providing a zigzag path for flow of liquid betweenthe plates, the spacing being such as to cause a slight overlap of theinwardly -extending corrugation .crests.

Since the strips 12 are provided with corrugations more shallow than thecorrugations of the plates 10, 11, the liquid owing between the plates`has access to the inner surfaces of the plates 10, 11, not only betweenthe strips 12 but behind the saine and the liquid flowing between theplates will flow more rapidly in the spaces between the strips 12 thandoes the liquid which enters the spaces behind the strips. There willthus result a multitude of eddies in the liquid causing the liquid to bethoroughly mixed as it flows between the plates and the entire body ofliquid will be cooled. or heated uniformly as it leaves the spacebetween the plates.

tinned, with solder and then the plates and strips pressed together areheated to cause 'the 5 contacting portions of lthe plates with. thestrips to adhere by`virtue of the solder thus providing a structurewhichis-inwardly rein'- forced suiciently to prevent moderate pressuresfrom', causing bulging of the plates. In the form of the invention shownin Fig. 7 the strips. 12 arewreplaced by .sheets of wire mesh material;30 which sheets are each -provided a fstructurfe which is more easilyassembled and which proyides a greater num-y ber of points 'of adhesionthan provided by the strips. -The wire mesh will still cause a thoroughmixing ofl the liquid flowing ;0 through the device and will also givesubstantially the entire radiating surface of? the co1'.-

rugated plates.

In the form of Fig. 8 the strips .12 are replaced by wires 31 which arealso corrugated u; but provide a less mixing. of the fluidaslt flowslbetween the plates.

In the vutilization of thejexchange element thus described as an oilcooler for use with internal combustion enginesin the form shown Figs.l1 to 3 inclusive and 6, the platesof. a desired width, that is a desiredextent longitudinally of the'corrugations, are assembled in such manneras to provide for How of oil through the elements in-series.. As shownin Fig. 6 the first` two platesV 10 `and 11'to the left of the figurehave their end margins ex-l tended, lapping as at 13 andsolderedtogether and into 'the opening thus provided a coupling pipe vmaybeintroduced and soldered as for instance that shown at 14Fig. 3. At thelower end of 'the plates lOand 11 just referred to the plate 10 of thefirst pair'of plates -is lapped togetherwith the plate 10 of the second.element as indicated lat 1,5,`the

lapped margins lbeing soldered together and also the margins of theplates l1 of these two elements are lapped as indicated at 16, thearrangement being such as to provide'a header to receive liquid from thelirst vertical travel -between plates 10 and 1l,v which header is incommunication with the second pair of plates.

'By the provision of laps lland 18 shown at the top o f Fig. 6, the-next pair of elements is likewise connected and the arrangement is.which it is desired to utilize as for instance three pairs as shown inFigs. lg'to 3 inclusive. As an outlet for oil from `the final pair ofplates of the series, a pipe` 32 is shown as to. By this constructionthe flow of oil will continued throughout the number of elementsbe'substantially uniform across the width of the last element frombottom to .top thereof.,

closed as by dipping the end of t e assembled device into a bath ofsolder leaving the spaces between the plates 10 and the plates 11respectively 'open for passage of the gaseous medium as air 1n the caseof the oil cooler.

The ends of the lowenheaders are shown 'as provided with cleanout screwplugs 33 llwhich mav be removed to enable corrugated vas al whole ito.the4` same depth' as the strips12 and tinned. There is thus Inutilizing the thus described structure as van oil cooler there' is showna Vcasing 21 as ofsheet' metal shaped into -rectangular form with theendsl turnedl into parallel iian ges 22, 23 which may be securedtogether as by bolts 24 when the'assembly indicated in Fig. 3 has beenplaced therein.

Desirably angle members 25 are secured into each' corner of the casing21 to space the heat exchange element from,.the walls of the casing 21to permit air to ow therebetween. l To direct air into the space betweenthe plates ,10 and 11 oflthe assembly of Fig. 3,

there 'is shown a aring'extension of the walls'` `of the casing21indicated at 26. i

In use of thisidevice for cooling an internal combustlon engine as formstanceof an automobile, thefdevice 1s supportedln any suitable manneras at one side of themotor with the flaring member 26 directedtoward thestream of air from'the fan of the motor and' ,the 'oil passages .of thedevice are placed into the circulation of the oil of the motor by meansof couplings 14 and 19. Desirably the device is connected in series withthe usual loil filter, therefore being in a bypassof the main lubricantcirculation to the bearing sursettlings to faces of the motor.1 Thisarran ement is' desirable since experiments have s own that so connectedthe co ling of the oil will be suf- ,ficient with rela ively sma-lloverall dimensions of the device andbecause in the'bypass the pressureupon the oil will be less.than would be metwith inthe main oilcirculaltion. Obviously however the device may be placed in the saidmain circulation system,'in

vwhich event a larger device must be utilized to vprovide passage -of.the large quantity 'of internal pressures. It is 'obvious that thedevice may be placed as a section of the radiator of the automobile, andwhen so' applied may be formed with a less number of vertical elementsofv greater height ,lif desired.,A

For other uses of the invention the elements comprising plates 10, 11and strips ,12 may be oil therethrough without developing too great iasconnected to upper and lower headers27, 28, 3

as indicated i'n Figs. 4 and 5 in which ar rangement the passage ofliquid to be cooled through the elements would be in parallel.

While the wire mesh of Fig. 7 is shown ar'-l ranged with the wireserpendicular and parallel respectively wit the corru ations of theplates, it is obvious that all o the wires Y different VVtempera/17117@Minor changes may be made in the physical embodiment of the inventionwithin the scope of the appended claims without departing from thespirit of the invention.

I claim:

1`. A heat exchange element comprising, in combination, spaced deformedplates associ- 1 ated to provide a tortuous path for iiuid flowingtherebetween,` a plurality of spaced elements between said platesspanning said deformities and contacting the plates at a plurality ofspaced points whereby said fluid may surround said elements to provideheat exchange within the mass of the fiuid,said elements providing heatconductivity between said mass and said plates.

2. vAn oil cooling` device comprising, in

' combination, a plurality of heat exchange elements as claimed in claiml connected for flow ofoil therethrough in series, means to .connect thefirst and last of said elements to the lubrication system of a machine.

3. An oil cooling device comprising, in combination, a plurality of heatexchange elements as claimed in claim l4 arranged in parallel relation,headers connecting an end of each element 'with the adjacent' end of they succeeding element to provide for flow of oil therethrough in seriesand means to connect the free ends'of the lirst and last elements withthe lubrication system of amachine.

4. An oil cooling device comprising, in combination, a plurality of heatexchange elements as claimed in claim' 1 arranged in parallel relation,headers connecting an end of each element with the adjacent end of thesucceeding element to provide for flow of oil therethrough in series,means to connect the free ends of the iirst and last elements with thelubrication system of a machine, and removable plugs in the ends of someof headers for cleaning purposes.

`5. heat exchange element comprising, in combination, spaced deformedlates associated to provide atortuous path or Huid flowing;the'rebe'tween,V spacing a vplurality of spaced'el'ements between -saidplates spannlng said deformities` and secured to the plates at avplurality of s aced pointswhereby said fluid may surround said means toprovide heat exchange 4within the massI of the said fluid, said elementsproviding heat conductivity between said mass and said plates.

6. A heat exchange element comprising, in'

combinatiomspaced deformed plates inwardly presenting alternateconvexities and concavities, those on each plate arranged 1n staggeredrelation to those on the opposed plate, spacing and turbulence producingmeans between said plates, said means comprising a sheet o f fgrg'amjnousmateral, Said sheet conta'tiiig and secured to the inwardlydirected ,crests of said deformities.

rial spaced -apart a distance substantially equal to their width, saidstrips contacting with and secured to the inwardly directed crests ofthe corrugations of the plates.

8. A heat exchange element, comprising in combination, spaced corrugatedplates providing a tortuous passage therebetween, a

plurality of spaced spacing elements between said plates, said elementscorrugated to a less depth than said plates and with the distancesbetween crests equal to the corrugations of said plates, the concavitiesof the corrugations of the elements contacting with the inwardlydirected crests of the corrugations of the plates.

9. A heat exchange element, comprising-in combination, corrugated'plates so spaced apart that the crests of the inwardly directedcorrugations stand closely adjacent a common plane, a plurality ofspaced spacing and locating elements between said plates, isaid elementscorrugated to register with the corrugations of said plates but to aless depth than the latter, the concavities vof the corrugatio'ns oftheelements contacting with the inwardly directed crests of thecorrugations of the plates andsecured thereto at a plurality of pointsalong each of said crests.

10. A heat exchange element, comprising in combination, corrugatedplates-so spaced that the crests of the inwardly directed corrugationsstand closely adjacent a common plane and opposite the concavities ofthe oposite plate corrugations, spacing and locating means comprlsing aplurality of wires extending at an angle to the said corrugations, said`wires corrugated to register wlth the corrugations of the plates but tora less depth than the corrugations ofthe plates, the concavities of thewire corrugations :contacting with and secured to theinwardly-facingcrests of the corrugations of the plates.

11. A heat exchange element, comprising in combination, a plurality ofcorrugated plates so spaced and arranged that the Walls of thecorrugations of each are parallel to those of the other with theinwardly directed 5 crests closely adjacent a common plane, spacing vandlocating means between said plates comprising a sheet of Wire meshmaterial corl rugated as a whole to register with but-corrugated to aless depth than said plates, some .o ofthe wires of said mesh extendingat an f angle to the corrugations of said plates, the inwardly directedcrests of the plates contacting with the concavities of and` secured tothe corrugations of the mesh. 5A `12. An oil cooling device comprising,in combination, aplurality of parallel spaced elements each comprising apair of spaced I corrugated plates providing a tortuous path Vfor liquidtherebetween, the spaces between ofsaid k'plates at the edges thereofclosed, an end of the outside elements closed and pro` vided with meansfor coupling to an oil circulation pipe of a machine, the plates of thealternate ends of the elements overlapped 5 with and connected to theplates of the adj acent elements to provide headers to enclose la pathfor oil flow through the assembled elements in series, an open'endedcasing enclosingV the assembly and a flaring 'ilange to i direct a blastof air through the assembly lengthwise of the corrugations.

13. An oil cooling devicecomprising, in. combination, a plurality ofspaced elements each comprising' a pair of spaced deformed i platesproviding a tortuous path for liquid therebetween, the spaces betweenthe plates of each elementat the edges thereof closed, an end of eachoutside element closed and provided with means for coupling to an oilcirculation pipe of-amachine, means to place each Vof the alternateremaining ends of said j elements intocommunicationwith an end of anadjacent element to enclose a path for oil i'low ythrouh said elementsin series and f means in the outlet end element to providemore-restricted How from said element adjacent the coupling than at theedge remote therefrom.

' HERBERT V. DALGLIESH.

'I CERTIFICATE or CORRECTION.

'Patent No. 1, 791,'4153. Granted February' 3, y 1931, to

HERBERT v.-DALCL1ESH.

AIt is hereby certifiedvthat error' appears in the printedspecificationf the.I above numbered patent requiring correction` asfollows: Page 3, line`60, claim "-.Y'lstrike out `the word "spacing";and that the said Letters Patent should'be Aread with this correctiontherein that the same may `eonformtothe record of,

' thecasc in the lPatent Office. 1 l i y' Signed and ysealed this 24thday of February, A. D. 1931.,

